Hat liner



FIG. 1 is a front elevation view of a hat liner according to the invention;

FIG. 2 is a top plan view of the hat liner, the bottom is a mirror image thereof;

FIG. 3 is a rear elevation view of the hat liner;

FIG. 4 is a right side view of the hat liner, and the left side view is identical to the right side view; and,

FIG. 5 is a perspective view of the hat liner. 

CLAIM We claim the ornamental design for a hat liner, as shown and described. 